Exhibit 4.2LENDER ADDENDUM          THIS LENDER ADDENDUM, dated as of August 14, 2007 (this “Agreement”), by and amongBANK OF AMERICA, N.A. (the “Lender”), WASTE SERVICES (CA) INC., an Ontario corporation(“WSCA”), WASTE SERVICES, INC., a Delaware corporation (the “Borrower”), LEHMANCOMMERCIAL PAPER INC., as administrative agent (in such capacity, the “AdministrativeAgent”), and Canadian Imperial Bank of Commerce, as Canadian agent (in such capacity, the“Canadian Agent”).RECITALS:          WHEREAS, reference is hereby made to the Second Amended and Restated Credit Agreement, datedas of December 28, 2006 (as amended by the First Amendment, dated as of April 12, 2007, and as itmay be amended, restated, supplemented or otherwise modified from time to time, the “CreditAgreement’’; the terms defined therein and not otherwise defined herein being used herein astherein defined), by and among WSCA, the Borrower, the lenders party thereto from time to time, theAdministrative Agent, the Canadian Agent, Lehman Brothers Inc., as Arranger, CIBC World MarketsCorp., as Syndication Agent, and Bank of America, N.A., as Documentation Agent; and          WHEREAS, pursuant to Section 2.4(e) of the Credit Agreement, the Borrower and WSCA mayincrease the existing Canadian Revolving Credit Commitments by entering into one or more lenderaddenda with the new Canadian Revolving Credit Lenders.          NOW, THEREFORE, in consideration of the premises and agreements, provisions and covenantsherein contained, the parties hereto agree as follows:          The Lender hereby agrees to commit to provide its new Canadian Revolving Credit Commitment asset forth on Schedule A annexed hereto, on the terms and subject to the conditions set forth below:          The Lender (i) confirms that it has received a copy of the Credit Agreement and the other LoanDocuments, together with copies of the financial statements referred to therein and such otherdocuments and information as it has deemed appropriate to make its own credit analysis and decisionto enter into this lender addendum (this “Lender Addendum”); (ii) confirms that it is anexisting Lender (as defined in the Credit Agreement); (iii) agrees that it will, independently andwithout reliance upon the Administrative Agent or any other Lender (as defined in the CreditAgreement) or Agent and based on such documents and information as it shall deem appropriate at thetime, continue to make its own credit decisions in taking or not taking action under the CreditAgreement; (iv) appoints and authorizes the Administrative Agent and each other Agent to take suchaction as agent on its behalf and to exercise such powers under the Credit Agreement and the otherLoan Documents as are delegated to Administrative Agent and each other Agent, as the case may be,by the terms thereof, together with such powers as are reasonably incidental thereto; and (v)agrees that it will perform in accordance with their terms all of the obligations which by theterms of the Credit Agreement are required to be performed by it as a Lender (as defined in theCredit Agreement).          The Lender hereby agrees to make its new Canadian Revolving Credit Commitment on the followingterms and conditions:1. **Proposed Commitment Increase**. This Lender Addendum represents the Borrower’s request toincrease the Canadian Revolving Credit Commitments as follows (the “Proposed CommitmentIncrease”):
 

 
 a. Business Day of Proposed Commitment Increase: August 14, 2007 b. Amount of Proposed Commitment Increase: $5,000,0002. **Credit Agreement Governs.**Except as set forth in this Lender Addendum, New CanadianRevolving Credit Loans shall otherwise be subject to the provisions of the Credit Agreementand the other Loan Documents.3. **WSCA’s and Borrower’s Certifications**. By its execution of this Lender Addendum, theundersigned officer, to the best of his or her knowledge, WSCA and the Borrower hereby certifythat: i. Each of the representations and warranties made by any LoanParty in or pursuant to the Loan Documents are true and correct in all materialrespects on and as of the date hereof as if made on and as of the date hereof,except for representations and warranties expressly stated to relate to aspecific earlier date, in which case such representations and warranties weretrue and correct as of such earlier date; ii. No event has occurred and is continuing or would result fromthe consummation of the Proposed Commitment Increase contemplated hereby thatwould constitute a Default or an Event of Default; iii. The Proposed Commitment Increase is permitted under the SeniorSubordinated Notes Indenture; and iv. Each of WSCA and the Borrower has performed in all materialrespects all agreements and satisfied all conditions which the Credit Agreementprovides shall be performed or satisfied by it on or before the date hereof.4. **Borrower Covenants**. By its execution of this Lender Addendum, Borrower hereby covenants thatit shall (i) deliver or cause to be delivered an executed legal opinion from Canadian counselto the Loan Parties, in form and substance reasonably acceptable to the Administrative Agent,together with all other legal opinions and other documents reasonably requested by theAdministrative Agent in connection with this Lender Addendum, and (ii) pay to the Lender a feeequal to 0.375% of the aggregate principal amount of such Lender’s new Canadian RevolvingCredit Commitment.5. **Notice**. For purposes of the Credit Agreement, the initial notice address of each newCanadian Revolving Credit Lender shall be as set forth below its signature below.6. **Recordation of the New Canadian Revolving Credit Commitments**. Upon execution and deliveryhereof, the Administrative Agent will record the new Canadian Revolving Credit Commitment madeby the Lender in the Register.7. **Amendment, Modification and Waiver**. This Lender Addendum may not be amended, modified orwaived except by an instrument or instruments in writing signed and delivered on behalf ofeach of the parties hereto.8. **Entire Agreement**. This Lender Addendum, the Credit Agreement and the other Loan Documentsconstitute the entire agreement among the parties with respect to the subject matter hereof and thereof and supersede all other prior agreements and understandings, both written andverbal, among the parties or any of them with respect to the subject matter hereof.
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9.  **GOVERNING LAW. THIS LENDER ADDENDUM AND THE RIGHTS AND OBLIGATIONS OF THE PARTIES HEREUNDERSHALL BE GOVERNED BY, AND CONSTRUED AND INTERPRETED IN ACCORDANCE WITH, THE LAW OF THE STATEOF NEW YORK.** 10. **Severability**. Any term or provision of this Lender Addendum which is invalid orunenforceable in any jurisdiction shall, as to that jurisdiction, be ineffective to the extentof such invalidity or unenforceability without rendering invalid or unenforceable theremaining terms and provisions of this Lender Addendum or affecting the validity orenforceability of any of the terms or provisions of this Lender Addendum in any otherjurisdiction. If any provision of this Lender Addendum is so broad as to be unenforceable,the provision shall be interpreted to be only so broad as would be enforceable. 11. **Counterparts**. This Lender Addendum may be executed in counterparts, each of which shall bedeemed to be an original, but all of which shall constitute one and the same agreement.[Remainder of page intentionally left blank]
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          **IN WITNESS WHEREOF**, each of the undersigned has caused its duly authorized officer to executeand deliver this Lender Addendum as of August 14, 2007.      BANK OF AMERICA, N.A.